Water intrusion/extrusion in hydrophobized mesoporous silica gel in a wide temperature range: Capillarity, bubble nucleation and line tension effects

- Intrusion and extrusion pressures of {silica gel C8 + water} system were investigated in the 10-150 °C temperature range.
- Unexpected non-linear temperature dependence for extrusion pressure is observed.
- Results are treated by means of capillary and nucleation theories.
- Temperature dependence of contact angles is calculated under the “Sharp-kink” approximation.
- Line tension effect is taken into account.